/*图片缩放*/
	function chgdivimgwh(obj,width,height){
		 var image=new Image();
		 image.src=obj.src; //获取图像路径
		 var width1=image.width; //获取图像宽度
		 var height1=image.height; //获取图像高度
		 var a1=height1/width1;
		 var a2=height/width;
		 if(a1>a2){
		  obj.width=width;
		  obj.height=height1*width/width1;
		  obj.style.marginTop='-' + Math.round((obj.height-height)/2)+ 'px';
		 }else{
		  obj.height=height;
		  obj.width=width1*height/height1;
		  obj.style.marginLeft='-' + Math.round((obj.width-width)/2)+ 'px';
		 }
	}
	
//黑色遮罩层-隐藏
function undercover(){
	$('.mask-filter-div').hide();
}
//黑色遮罩层-显示
function cover(){
	$('.mask-filter-div').show();
}	
	

function altergoodsnum(n){
	var num = parseInt($('#number').val());
	var maxnum = parseInt($('#number').attr('max'));
	num += n;
	num <= 0 ? num = 1 :  num;
	if(num >= maxnum){
		$(this).addClass('no-mins');
		num = maxnum;
	}
	$('#store_count').text(maxnum-num); //更新库存数量
	$('#number').val(num)
}
/**
 * 提示弹窗
 * */
function showErrorMsg(msg){
    layer.open({content:msg,time:2});
}


/*倒计时*/
$.extend($.fn,{
    //懒人建站 http://www.51xuediannao.com/
    fnTimeCountDown:function(d){
        this.each(function(){
            var $this = $(this);
            var o = {
                hm: $this.find(".hm"),
                sec: $this.find(".sec"),
                mini: $this.find(".mini"),
                hour: $this.find(".hour"),
                day: $this.find(".day"),
                month:$this.find(".month"),
                year: $this.find(".year")
            };
            var f = {
                haomiao: function(n){
                    if(n < 10)return "00" + n.toString();
                    if(n < 100)return "0" + n.toString();
                    return n.toString();
                },
                zero: function(n){
                    var _n = parseInt(n, 10);//解析字符串,返回整数
                    if(_n > 0){
                        if(_n <= 9){
                            _n = "0" + _n
                        }
                        return String(_n);
                    }else{
                        return "00";
                    }
                },
                dv: function(){
                    //d = d || Date.UTC(2050, 0, 1); //如果未定义时间，则我们设定倒计时日期是2050年1月1日
                    var _d = $this.data("end") || d;
                    var now = new Date(),
                        endDate = new Date(_d);
                    //现在将来秒差值
                    //alert(future.getTimezoneOffset());
                    var dur = (endDate - now.getTime()) / 1000 , mss = endDate - now.getTime() ,pms = {
                        hm:"000",
                        sec: "00",
                        mini: "00",
                        hour: "00",
                        day: "00",
                        month: "00",
                        year: "0"
                    };
                    if(mss > 0){
                        pms.hm = f.haomiao(mss % 1000);
                        pms.sec = f.zero(dur % 60);
                        pms.mini = Math.floor((dur / 60)) > 0? f.zero(Math.floor((dur / 60)) % 60) : "00";
                        pms.hour = Math.floor((dur / 3600)) > 0? f.zero(Math.floor((dur / 3600)) % 24) : "00";
                        pms.day = Math.floor((dur / 86400)) > 0? f.zero(Math.floor((dur / 86400)) % 30) : "00";
                        //月份，以实际平均每月秒数计算
                        pms.month = Math.floor((dur / 2629744)) > 0? f.zero(Math.floor((dur / 2629744)) % 12) : "00";
                        //年份，按按回归年365天5时48分46秒算
                        pms.year = Math.floor((dur / 31556926)) > 0? Math.floor((dur / 31556926)) : "0";
                    }else{
                        pms.year=pms.month=pms.day=pms.hour=pms.mini=pms.sec="00";
                        pms.hm = "000";
                        //alert('结束了');
                        return;
                    }
                    return pms;
                },
                ui: function(){
                    if(o.hm){
                        o.hm.html(f.dv().hm);
                    }
                    if(o.sec){
                        o.sec.html(f.dv().sec);
                    }
                    if(o.mini){
                        o.mini.html(f.dv().mini);
                    }
                    if(o.hour){
                        o.hour.html(f.dv().hour);
                    }
                    if(o.day){
                        o.day.html(f.dv().day);
                    }
                    if(o.month){
                        o.month.html(f.dv().month);
                    }
                    if(o.year){
                        o.year.html(f.dv().year);
                    }
                    setTimeout(f.ui, 1);
                }
            };
            f.ui();
        });
    }
    });
/*倒计时end*/